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CVE-2025-22057

net: decrease cached dst counters in dst_release

MEDIUM
5.5
CVSS Score
Published: April 16, 2025 at 02:12 PM UTC
Updated: October 30, 2026 at 01:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: net: decrease cached dst counters in dst_release Upstream fix ac888d58869b ("net: do not delay dst_entries_add() in dst_release()") moved decrementing the dst count from dst_destroy to dst_release to avoid accessing already freed data in case of netns dismantle. However in case CONFIG_DST_CACHE is enabled and OvS+tunnels are used, this fix is incomplete as the same issue will be seen for cached dsts: Unable to handle kernel paging request at virtual address ffff5aabf6b5c000 Call trace: percpu_counter_add_batch+0x3c/0x160 (P) dst_release+0xec/0x108 dst_cache_destroy+0x68/0xd8 dst_destroy+0x13c/0x168 dst_destroy_rcu+0x1c/0xb0 rcu_do_batch+0x18c/0x7d0 rcu_core+0x174/0x378 rcu_core_si+0x18/0x30 Fix this by invalidating the cache, and thus decrementing cached dst counters, in dst_release too.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.6 ≤ v < 6.6.876.13 ≤ v < 6.13.116.14 ≤ v < 6.14.26.7 ≤ v < 6.12.234.6d71785ffc7e7cae3fbdc4ea8a9d05b7a1c59f7b8
Vendor states this is fixed in 3a0a3ff6593d670af2451ec363ccb7b18aec0c0a (fixed)
Vendor states this is fixed in 836415a8405c9665ae55352fc5ba865c242f5e4f (fixed)
Vendor states this is fixed in 92a5c18513117be69bc00419dd1724c1940f8fcd (fixed)
Vendor states this is fixed in ccc331fd5bcae131d2627d5ef099d4a1f6540aea (fixed)
Vendor states this is fixed in e833e7ad64eb2f63867f65303be49ca30ee8819e (fixed)
Vendor states this is fixed in 4.6 (unaffected)
Vendor states this is fixed in 6.12.23 (unaffected)
Vendor states this is fixed in 6.13.11 (unaffected)
Vendor states this is fixed in 6.14.2 (unaffected)
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.6.87 (unaffected)

References (6)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3a0a3ff6593d670af2451ec363ccb7b18aec0c0a
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/836415a8405c9665ae55352fc5ba865c242f5e4f
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/92a5c18513117be69bc00419dd1724c1940f8fcd
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ccc331fd5bcae131d2627d5ef099d4a1f6540aea
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e833e7ad64eb2f63867f65303be49ca30ee8819e
Source: cverecord
https://git.kernel.org/stable/c/973bb0bc6240b55e313248ef3c6aa551ab7bb735

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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